18
-15
4
-1
7
-3
12
-1
18
-8
14
-11
15
-10
2
-1
4
-1
17
-10
18
-1
11
-1
16
-4
16
-10
4
-1
19
-15
7
-4
4
-3
15
-12
15
-11
Practice subtraction within 20 with free printable worksheets. Uniquely generated — reinforce key math skills with every set.
Frequently Asked Questions
How do I use this Subtraction Within 20 Hard Worksheets worksheet?
Print the worksheet and complete the problems. Each set number generates a unique arrangement. Use the same set number for all students in a class for consistent assessment.
Is there an answer key?
Yes — every worksheet includes a complete answer key. Print it separately or view it on screen.